KENNEDY SPACE CENTER, FLA. - In the Space Station Processing Facility, workers prepare to attach the Human Research Facility-2 (HRF-2) science rack onto the Rack Insertion Device. HRF-2 will be installed into the Multi-Purpose Logistics Module Raffaello (at left) for flight on Space Shuttle Discovery?s Return to Flight mission, STS-114. The HRF-2 will deliver additional biomedical instrumentation and research capability to the International Space Station. HRF-1, installed on the U.S. Lab since May 2001, contains an ultrasound unit and gas analyzer. Both racks provide structural, power, thermal, command and data handling, and communication and tracking interfaces between the HRF biomedical instrumentation and the U.S. Laboratory, Destiny. NASA Kennedy Space Center and their prime contractor responsible for ISS element processing, The Boeing Company, prepared the rack for installation. The HRF Project is managed by NASA Johnson Space Center and implemented through contract with Lockheed Martin, Houston, Texas.